How are Flight Data Recorders built?

  • #1
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I am curious as to the components of FDRs that allow them to sustain such g-forces and immense heat. Surely it's not just a steel box filled with paraffin wax. What alloys are used? what shapes are used in internal construction to prevent crushing/penetration? What do they insulate with and how is it layered? How is the SSD secured in the chassis? Is the chassis pieced together or cut from a single piece of metal?
I apologize for so many questions in one post, but I am genuinely curious about how these and similar pieces of technology work. I am ultimately seeking an example of the materials used and they way they are combined. Thank you for all of your help.
 

Answers and Replies

  • #3
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I have, but I have yet to find technical documents or anything specific that is not outdated. I am looking for specifics, mainly on how the insulation is layered and how the SSDs are secured. I cannot find this. Please let me know where you have found it.
 
  • #4
Mech_Engineer
Science Advisor
Gold Member
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This image seems pretty specific, but I'm not sure you'll find the exact design files online since it's probably proprietary information.

https://www.aea.net/AvionicsNews/ANArchives/FlightDataRecordersJan06.pdf
upload_2016-10-13_9-35-27.png


There's also a video of a guy disassembling a smaller one for a private jet on YouTube, I assume you've seen it?
 
  • #5
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I saw the video but not the picture. I was afraid I would run into the 'its proprietary' thing, i guess I was hoping that there was some design commonly held as the correct way, this fairly similar between manufacturers, like car tires. Thanks for the help, I'll dig around on FAA forums I guess.
 

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